China has called on Iran to come to a long-awaited agreement with six world powers over its dubious nuclear program and "finish the last kilometer of the marathon talks well," without extending the deadline for the third time.

Foreign Minister Wang Yi said the talks between Tehran and the
P5+1 powers (the US, Russia, China, Britain and France, plus
Germany) were a "historic opportunity" to resolve the
dispute over Iran's nuclear activities.
"The negotiations have seen positive progress," he said in
Tehran, but "they have become more difficult and
complicated" as they come close to a conclusion, AFP
reported.

While Iran insists it has no nuclear weapons ambitions, it is
subject to wide-ranging Western and United Nations sanctions.
Disagreements in the talks revolve around the extent of nuclear
activities Iran will be allowed to continue and the timetable for
the lifting of the sanctions.

"Reaching comprehensive agreement is beneficial to Iran
upholding its own legal rights, including the right to the
peaceful use of nuclear power, and for the people of Iran to
throw off the difficulties of sanctions as early as possible and
focus on energetically developing the economy," Wang told
his Iranian counterpart, according to a Chinese Foreign Ministry
statement issued on Monday.

Iranian counterpart Mohammad Javad Zarif has agreed that "the
opportunity must be seized" for a deal, adding that Iran was
ready "to show flexibility to reassure the P5+1 group."
Zarif stated that China was a “key” member in the six
world powers group and Iran counted on its role in helping to
reach a “good” solution to the nuclear issue, Tehran Times
reported.

Chinese Foreign Minister meanwhile noted that the deal would also
help Iran finally escape from sanctions allowing the country to
"energetically develop the economy."

China and Iran have had close economic, trade and energy ties, as
China's crude oil imports from Iran soared by nearly 30 percent
last year to their highest level since 2011.

Wang said he saw "enormous space for cooperation" on
more industrial projects, with China "willing to encourage
even more Chinese companies to invest in Iran and build factories
via the joint development of industrial parks in accordance with
Iran's development needs and China's ability."

According to Wang, China was in favor of peaceful settlement of
the nuclear issue.
"Whatever the circumstance, we firmly support talks, oppose the
use of violence and disapprove unilateral sanctions," Xinhua
quoted him as saying.

Two deadlines for a final agreement on Iran's nuclear program
have been missed since an interim deal was reached in November
2013. Iran and P5+1 powers are expected to reach a basic
framework agreement by the end of March, with a final accord due
by June 30.

Earlier this month Iran’s parliament passed a bill asking the
government to resume all nuclear activities if US imposes new
sanctions.

“Naturally, if there is no agreement on the issue [Iran’s
nuclear program] then both sides can return back to their
previous positions,” the general director of Iran’s Foreign
Ministry Political and International Security Department, Hamid
Baedinejad, told reporters at the country’s embassy in Moscow.
“Iran can continue to develop its nuclear program from the
perspective that benefits the country’s national interests. Iran
will continue its development and we will install more
centrifuges.”